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Taidacent Pressure Sensitive Pen Micro Force Trigger Flexible Pi

$6

Taidacent Pressure Sensitive Pen Micro Force Trigger Flexible Pi

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Product Description

Description

Force Sensitive Resistor are resistive sensor exhibiting vary resistance that responds to force applied to the sensing area. As force on the sensor is increased, resistance is decreased.

For the single -zone sensors, as the sensor is a Two-terminal device that can essentially be treated as a variable resistor whose value is controlled by applied force, and also a switch whose threshold is controlled by applied force and setting up.

The sensors are made up of robust polyester film, high-conductive material and Nano-sized force sensing material. The top layer of the sensor consists of the area of force sensitive layer on a flexible film. And bottom layer is comprised of conductive circuit traces on a flexible film. And the above two layers are S are stick together by spacer adhesive and active area is without adhesive. When the active area is applied force, force sensitive layer on the top layer shunts the circuit traces on the bottom, varying resistance output terminals.

Parameter

Thickness 0.2mm with Rear ADH
Shape flexible
Actuation force 5g Res. lt;=200K2
Sensitivity range 5g to 600g
Resolution 5g to 600g
Non-actuated resistance gt;1MΩ
Response time lt;10us
Operating temperature -40C~+ 85C
Life time gt;1 million
Repeatability same part +/-5%,Ave. R@500g
Repeatability part to part +/- 15%, Ave. R@500g
Hysteresis + 10%, (RF+ - RF- )/FR+ , @500g
EMI Generates no EMI
EDS not ESD sensitive
Drift lt;10%, 500g load, 24H

Size

FSR Piezo Pressure TransducerFSR Piezo Pressure Transducer

Feature

  • Static / dynamic pressure sensing
  • Quick response
  • Durable long life
  • Customized design

Force curve

Electric Film Force SensorElectric Film Force Sensor

Plot explanation

The first plot shows an example response resistance curve, when the sensor actuated by a force curve tester.

The second plot shows an near-linear curve which is 1/R at F.

Application Circuit

Piezoelectric Film Force SensorPiezoelectric Film Force Sensor

1, Voltage Divider

The sensor is placed in series with a fixed resistor (R0), and output voltage is measured across RO. It is given by Vout=Vcc* RO/(R0+Rs).

How to define the fixed resistor value, Basically, RO is 1/3 to 1/2 of the resistance range of Rs. What’S more, if RO is appropriate, you can get a near-linearcurve of Force VS Vout in a special force range. Depending on the impedance requirements of the measuring circuit, the voltage divider could be followed by an op-amp.

Flexible FSR Piezo Pressure SensorFlexible FSR Piezo Pressure Sensor

Force Threshold Switch

This is an ideal circuit for applications that require on-off switching at a specified force.

It consists a Wheatstone bridge circuit and a voltage comparator.

When apply force and Rs becomes to be lower than R1, lead U1+ to be higher than U1-, and Vout becomes to be high. This high level signal can used to be trigger signal of following devices, for example, it can trigger a relay, and then control LEDs, buzzer warning, motor and other load devices.

Taidacent Pressure Sensitive Pen Micro Force Trigger Flexible Pi

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